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# splitViewControllerDidExpand(_:)

Tells the delegate that the split view controller interface has expanded.

```
optional func splitViewControllerDidExpand(_ svc: UISplitViewController)
```

## Parameters

`svc`

The split view controller whose interface has expanded.

## Discussion

This delegate method only applies to column-style split view interfaces. For more information, see [`Split view styles`](/documentation/UIKit/UISplitViewController#Split-view-styles).

The split view controller calls this method after its interface has expanded, meaning that [`isCollapsed`](/documentation/UIKit/UISplitViewController/isCollapsed) is <doc://com.apple.documentation/documentation/Swift/false>. Use this method to perform any customization associated with the expanded interface.

---

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